T square



H. T.- HUBBARD T S QUARE Filed NOV. 9, 1922 Patented Cet. 23, 1923.

UNETED STATES PATE 7 einen fr `ENCE@ i HUBERT fr. HUBBARD, or DETROIT, MICHIGAN,

T SQUARE;

Application filed November 9, 1922.1 Serial No. 599,87-3.` v

To all whom t may concern.'

Be it known that I, HUBERT T. HUBARD',

a citizen of the United States, residing at proceeds, the invention ,resides in the com-Vv triangular Detroit, in the county of .lWayne and State of liichigan, have invented certain new and useful :improvements iii a T Square, of which the following is a specification The present invention relates to ya T- squa-re and has for its principal object to provide means whereby the T-squares may binat-ion and arrangement of'parts and in the detailsof construction hereinafter described and claimed, it being understood that changes in the precise embodiment ofv the iurention herein disclosed, can be made wit-hin the scope of what is claimed without departing from the'spirit f the inif'entioii.

ln thedrawings:- Y Figure l is a perspective of the T-square embodying my invention,

Figure 2 is a fragmentary planV view thereof, and y Figure 3 is a fragmentary detail of one end ofthe head of the T-square, Y

Referring' to the drawing in detail, itk

will be seen that the lblade l is of the usual construction being, attached to the intermediate poition of the head 2. The upper surface of 'the head 2 is `provided with a shaped recess 3 registering with the.r central portion of. the blade l. A pair of blocks 3 are hinged at t, one to cach end of the head 2 and are provided with rods" 5 extending into recesses 6 in the head 2. A threaded shank 7 pro` jects from each rod 5 through a curvedY slot 7 in the head 2-and a look nut 9 isA mounted thereon so that. the blockl Sinay be held in any adjusted position in` angular relation with the blade Vl. An indicator l()4 is mounted on the inner end of each block 3 .and is adapted to be 'disposed in the triangular shaped recess 3 whenV the block lies in abutment with the head 2. The point ll of eachjindicator l0 projects through arcuate slots vin the blade l' a corresponding slot l2 being provided in a plate l2 mounted on the blade l and providedwith suitable i degree indicating indicia. v-

lt will be readily understood that either of the blocks 8 may be easily adjusted to the desired angle, and the adjusted block will be engaged with theedge of thedrawing board so that parallel-.angularly eXte-ndiiiglines l may be drawn as'desired. y I -v Having thus described my invention what Y l. In combination, a 'IscjualreV including a blade and a head, a block pivoted to the head, an indicator, said blade provided with an arcuate slot, said indicator projecting throufrh said Vslot and mea-ns for holdin the block in adjusted position in relation to the head. 4 Y

2. In combination, a Tesjquare including a Vblade and a head, provided with a recess, a bloclrpiyoted to the head, an indicating vdevice mounted '"onthe block so as to project into the recess ofl'saidhead-whenthe block is abutting the head, said blade provided with aVv slot, said indicator projecting through said slot, and meansfor holding thev blockA in adjusted relation to the head.

Bfln combination, -a T-sqiiar'e including a Ablade and a' head, a1 pair of blocks, one pivoted to each end of the head, Iandlindicating means associated with the blade .for designating the angle at which vblocks eX- t-end from the head.

j Il. ln' combination, a T-square including a blade and al head, alpair of blocks, one?. 1 pivoted to e-aohend of the head, and means associated with the blocks for' holding the blocks Vat different angles in respecttothe head;

in presence oftwo witnesses. A' A .y Y HUBERT' r. Hussein).

l/Vitnesses: 1 i Y RQ M. Borna, FEEMAN Y MOTSINGER.

vvln testimony whereof I affix my signature 

